[Trust him when he says he's had worse and with a keener nose. Sometimes you augment your senses with magic and then you get dropkicked back to lv. 1 and you forget how sensory thingies work.]

Oh. Uhh. Yeah, something like that?

I read that that was one of the types of magic, anyway... so I, uh, doth figured I'd try the different types and see which one stuck.

[Lie. He already knows that he has an affinity for transformation plus a couple of other types of magic; but the experimentation part is true. Also he definitely immediately and accidentally started copying Urianger's style of speech while distracted by surveying the fruits of his labors......]